| Business | Phone |
| B Schreiner Drilling 760 Rancho La Baca Rd, Martinez 94553 | (925) 372-9055 |
| Butch's Excavating Inc 2050 Franklin Canyon Rd, Martinez 94553 | (925) 229-3572 |
| Clark's Backhoe Svc 5725 Likins Ct, Martinez 94553 | (925) 370-9187 |
| F S Aguiar & Son Trenching 623 Plumas Ct, Martinez 94553 | (925) 228-6861 |
| Gustin-Schreiner-Gustin Inc Martinez 94553 | (925) 335-0170 |
| Hamp's Excavating 2164 Franklin Canyon Rd, Martinez 94553 | (925) 228-2783 |
| Nunes Enterprise 306 Bear Oaks Ln, Martinez 94553 | (925) 229-0849 |
| Phil's Backhoe Svc 4931 Pacheco Blvd, Martinez 94553 | (925) 313-9075 |